Smoke-pipe air-check.



H` B HHS-A SMOKE PiPE .w CRECE,

APPUCUION ULL! GCT. 223, UJLJ.

lfzmnted J uly 4, 19H5.

lVashington,District ofC-olumbia', hav'ejin- .Parlant-ermee HULDRICKB.;REID,-'OFWASHINGTON,DISTRICT 0Fl COLLATIVHIBIA ASSIGNOR OE ONE- j. HALF T0 GRACE dfn-PEINE; OF'THEQDISTRICT OIE VCOLUMBlA.

Q lLsavior-Crimmi AIR-ordnen :i ,-.Specillcatien of LettersaBatent." P

rented Tiny 4., 1916.

Bc' it known that: I, HULDRICKB: a citizen Y. of, .the --United "States, -residing "at -vented .certain .new and-usefulImprovements This invention relates -to improvements-fin lating thed raft-iin smoke; pipes'ff 'ftrnaces,

consumption o'ffuel.

.boilers andthe like; .whereby the variations ofli'eat inthe fire bexulaylbc keptat''a minimum and the :combustion sejreg'latd as .to result in-considerable -`economyfin 'the Another. Objectis to provi'deja-draftlcon- Ytrolling device which is-perinanently fixedin the smoke piperadjacent tothe furnace, and acts to .automatically regulatejthefv'-draft therethrough by admitting more-or less air into the smoke pipe at thispoint to counteractA any'acceleration .or-diminution of the draft 'through the fire-bex,A due tothe vari able effectsv of winds upon the=chimney`e`r smekepipe, andithus toinantain al more even combustion in the fire-box. v I

A further object is Ato secure these-advantages in a structure that-is osuchra simple nature as to permit Aof itsv manufactureat a4 very small cost, which may bereadily installed in any smoke pipe without the necessity of any alteration whatsoever therein and which requiresno nicet-y of adjustment to cause the automatic regulation of draft therethrough. v

A full and complete. understanding of the invention may be obtained from a. careful consideration of the following ,detailed description` taken in connection with tlie:lac companyingr dra wing, forming a-pa rt of. this specification; it being understood that while the drawing,Y showsfa practical form of the invention, the latter is not confined to strict conformity therewith, lut may be changed or modified, as long asA such changes or modifications mark no material departure .from the salient features of the invention, as `specifically pointed out in the claims hereto appended. i

ln the drawing, in which like reference clmracterh` are. employed to designate corresponding parts ol' the structure in each of the figures:-Figure l is a Vertical, longitudinal," sectienal view. of the device applied T a'psmoke' pipe; 11E-ifs'. His a horizontal ="sectional ijiew'onthe line 2 2 f Fig. Land 1 nv' the direction indicated fby the S. Y As illustrated sin the drawing, the'inven- :"tion" coriip'rise's` a "cylindrical casing composed"- f 'sheetf |metal' sufliciently strong' to "Writhsti'ind the oftheextreme heat to "w'hic'h device 'may bf2-.subjected and is prot"rided w`itli"an"upper and a lower ext/ended collarrl and 2, of a diametertosnugly fit f within the adjacent ends of two sections-of jsta'ndad smoke pipeY as indicated at 3'l and L refs 'ectively'. p l 'f' h'c'fcollarsl` and 2 are of sufficient length- '-to'-ma intai the 'casing in rigid relation with the smoke pipe andl in longitudnal 'aline- A'ment therewith; andrwhile the device is shown in' the drawing so applied to avertical smoke pipe, it will be understood that thesanie is applicable toapilii'ein anyothcr lpo'sitlon.A i l e rl`he section t of the smoke pipe may be assumed to'conncct, asi-by an ordinary clbow, -(not shown) directly to a furnace or .'boilcrwhile'the section L of the smoke pipe is connected to achimncy which isalsonot -l illustrated. i

` The cylindrical easing is provided ad; jacent to the lower collar 2 with an enlarged circular air chamber 5 of a diameter con-- siderably greater than the. diameter of the said collar and haring its walls curved from top to bottom to provide a continuous circumferential concave inner face for a pur. .At the top of the en pose to be described. largedcircular chamber there. is provide-d an intermediate collar `suitably secured to the chamber 5, having its 'axis in longitudinal alinelueut with the axes` of the collars l and 2, and of .a diameter considerabljlf greater-than the diameter of the said collars and terminatingr at its upper cud in anatthc. lower end of ecllla r l and are fastened thereto.

Located within thdchaniber 5 and at the 11 are provided and connect, at their outerl ends, with openings 12 formed in the horizontal annular platform 7 and at their inner ends with appropriate openings 13 formed in the inclined partitlon 9, said ducts being curved along their axes to form 1 gooseneck's to conduct air from the out-v side atmosphere to a'point within the chamber 5 in a manner to strike the inner downwardly and inwardly curved face .of the chamber and be deflected toward the center of the chamber, there to be caught by the up-draft through fthe device caused by the suction of the chimney, as indicated by the arrows.

The plate'lO .serves to deflect the currents rising through the pipeI 4 and collar 2 away from the concave walls of the chamber 5 and thus prevents the same from interfering with the inflow of the downwardly and inwardly directed currents of fresh air throu h the ducts 11, and it will be seenthat, y'reason of the inclination of the annular partition 9, no cinders or soot will collect thereon and thus a clear passage through the center of the device is always maintained.

The outer periphery of the hood 8 is formed into a downwardly and inwardly turned flange 14-slightly spaced away from the platform 7 to provide space for the outer periphery of an annular dampenplate 15, provided, at its inner edge, with a depending, cylindrical sleeve 16, surrounding the intermediate collar 6 and adapted to rotate thereon.

Appropriate apertures 17 are formed in the damper-plate 15, and are adapted to register with the outer opeh end of the ducts 11, or to partially open the same upon the rotation of the plate 15 the proper direction, a handle 18 being provided on the same for this purpose. I Y

An ordinary butter-fly damper 19 is interposed in the lower collar 2 and is proy vided with an external manipulating handle 20 so that the draft may be wholly or partially cut oil' between the furnace and the device, when the chimney may find its source of air supply wholly orin part through the ducts 11, or the damper 19, upon being in full open position, will permit of the maximum effect of the draftlu'pon the fire at the same time a reduced volume of ai." is

standard smoke passing in through the ducts 11 and caused to swirl in an inward direction to' baille the suction of the draft upon the fire.

It will be seen that when a low or moderate Wind is blowing the supply for the chii'nney is drawn partially from the fire-box and partially through the ducts 11 and upon an increase in the suction a greater volume of air is drawn through the ducts in a downward direct-ion to counteract any excessive draft upon the hre, thus maintaining a regularity of draft no matter what the conditions in the chimney may be;

From the foregoing it will be seen that a simple, durable and cheaply constructed smoke pipe air check has been devised, which will not easilybecome deranged and which requires no `special adjustment or attention, the parts being suitably riveted,

crimped, or otherwise secured together and a5 that the same may be easily applied to any pipe without -requiring any expert knowledge therefor` I claim:

1. A smoke pipe air check comprising a casing provided with terminal collars, an air chamber provided-in the casing adjacent to one of the collars, a frustoconical hood arranged above and in overlying relation to the chamber and connected at its' upper end to the other colla-r, a downwardly and inwardly inclined annular partition located within the upper portion of the chamber terminating at its lower,` edge in an outwardly directed annular* deflector plate, ducts connecting the interior ofthe cham' ber near the walls thereof with the atmosphere and means for throttling the passage of air through the duets.

2. A smoke pipe air check comprising a circular casing having terminal 'collars adapted to fit a furnace smoke pipe, an enlai-ged air chamber adjacent to one collar,

edge of the chamber and provided at its inner, lower edge with an outwardly and dou-'nwardly 'directed annular dcfleetor plate, accurate air ducts communicatin with the space between the partition and the walls of the chamber and with the outside atmosphere and means for simultaneously controlling the inflow of air through the ducts.

A smoke circular easing having a collar at each end` for connection with a smoke pipe, a damper located in one of the collars, an enlarged circular air chamber arranged adjacent t0` iis from the upper pipe air check comprising a the latter collar and having a continuous eoncavoconvex wall of greater diameter tha n the collars, a downwardly and inwardly inclined annular partition secured to the upper edge of the chamber and located in the upper portion thereof, an outwardly directed annular deflecting plate carried by the lower edge of the partition and in spaced relation to the wallsl of the chamber and the upper end of the last mentioned collar, a hollow hood arranged above the chamber having its outer periphery of greater diameter than the chamber and communicatingr at its top with the other collar and provided at its bottom with a horizontally disposed annular wall, an intermediate collar connectingthe inner edge of the horizontal wall with the top edge of the air chamber, a plurality of openingsformed in the aforesaid inclined partition, a like number of radially alined openings formed in the horizontally disposed wall. curved tubular ducts connecting the several pairs of openingsto `establish communication between the in* terior of the chamber and the outside atmosphere, a depending annular flange arranged around the periphery of the hood, an annular damper-plate tting in the flange and having a depending sleeve surrounding the intermediate collar and openings formed in the plate to register with or uncover the open outerlends of the duets.

In testimony whereof I atlix my signature in the presence of two Witnesses.

HULDRICK B. REID.

Witnesses:

PHILIP F. LARNER5 W. C. BATES. 

